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Home >> Plymouth >> 1997 >> Prowler >> Repair and Diagnosis (Single Page) >> Engine Mechanical >> Mechanical >> 3.5L V6 Engine >> Overhaul (Service Procedures) >> Main Bearings >> Plastigage (Oil Clearance) Measurement

Plastigage (Oil Clearance) Measurement

  1. Remove oil from journal and bearing shell. Install crankshaft. Cut plastigage to same length as width of bearing and place it in parallel with journal axis. See Fig 1. Install main bearing cap carefully and tighten bolts to specified torque.
    CAUTION: Do not rotate crankshaft or plastigage will be smeared.
  2. Carefully remove bearing cap and measure width of plastigage at widest part using scale on plastigage package. See Fig 1. See CRANKSHAFT SPECIFICATION CHART . for proper clearances. If clearance exceeds specified limits. Replace main bearing(s) and if necessary have crankshaft machined to next undersize. Also see Measuring Main and Connecting Rod Bearing Clearance in Standard Service Procedures.
CAUTION: Do not rotate crankshaft, or Plastigage may be smeared.
Fig 1: Measuring Bearing Clearance With Plastigage
G00062586Courtesy of CHRYSLER CORP.
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